Water-cooling device for furnaces



June 17, 1941. E, J, McDo'NNELL 2,246,402

WATER-COOLING DEVICE. FOR FURNACES Filed sept.` 9. 1538 INVENTOR 'I am g. gil/cw .may n,

Patented June 17, 1941 UNITED: wwwsTarts PATENT OFFICE "1 i tgz/16,4032

I l WATER-COOLING DEVICE Fon FURNACES Edward J. McDonnell, Pittsburgh, la., assigmm to poration of NewJersey Application September 9, 1938, `Serial No.,229,117

6 Claims. I(Cl`. 122-499) This invention pertains to Water-cooling devices for furnaces, and especially, to a Water cooled furnace doorfrarne and skewback channel cooler combination `and to `improvements,

therein.

I In the Chandler latent` 2,074,576, a combination was provided in which Coldwater first enters and is initially heated inleg portions of the frame before it is introduced into the lintel; the purpose being to cut down oxygen corrosion in the latter. In the Robinson Patent 1,864,762, cooling water is first introduced into the lintel or noseportion and` is then conducted from outlets in the linteliinto leg# portions of the main frame; thepurposei beingr to wash out sediment andscale that readily forminhthe lintel.

And; `it has been an objectof the present invention to' provideepparatus incorporating the advantageous features of the Robinson and Chandler patents withoui'wthe` disadvantageous and limiting features thereofi Another object has been to provide a new and improved Water cooler construction that willenable a `better control of the cooling water and/or of cooling temperatures of the various parts thereof.

A further object has been to `provide a cooling device enabling independent and/,or parallel flow of cooling water through frame and lintel por` tions thereof. I I

These and many other objects of my invention will appear to those skilled in the art from the drawing, the description, and the appended claimen i Inthe drawing- I Figure 1 isa front elevation of a cooler :constructed `in accordance with the present` invention: n, I I I Figurel 2 is a horizontal sectional view taken along the line Il-II of Fig-urel;

, Figure 3 is a verticalsection taken along the linelII--IIIof Figure 1; I

Figurelt4 is a front elevation of a connector for individual inlet and/or outlet portions ofl themain frame construction;

Figure 5 isa front fragmentalelevation of a modified inlet arrangement of cooler construe tion; M. :I I.:

Figure 6 is a fragmental front elevation showing, another embodiment of my invention.

, In accordance with the usual practice, see Figure 3, a portion of a furnace roof 1 abuts a skewback 3 that is supported by `a skewback channelsil. v

The cooler designated generally by the refer-` Blaw-Knx Company, Pittsburgh, Pa., a corence` numeral` lllacomprisesafront body or face portion II and aback portion I2 having hollow leg portions I3 `extending vertically downwardly adjacent opposite ends thereof. The above-de a scribed same general description applies to the various embodiments of my invention illustrated, and. for this reason, `the same reference numerals are employed.

As Willbe appreciated, the lintel or nose poi-,` tion of a cooling device is subjected to. the highestf temperature, while 4the frame portions, including the legs, are subjected to a lesser temperature.

For this reason, the lintel portion is more sub-- action and oxidation produced by gases evolved from; the` cooling4 water. The present construction is: devisedl in such a manner that corrosion andiy precipitation are controlled and/or limited in the lintel andi theused Water is ledoff without contaminating thermainA frame portions of the cooling device; That. is, previously, there` `has, beenla tendency for sediment and corrosion from the.` lintel to deposit` in the: leg portions of the main iramewhere: itis difficult to remove them.

It-willbe` apparent that. the present invention eliminates the disadvantageous features of the previous constructionsin that the coolingvvater supply' isdem'tely controlled and segregated in thevarious portions of theconstruction and an independence of operative control and temperature'` regulation has been made possible. For eX- ample, inthe embodiment of my invention disclosed in` Figures 1A, inclusive, the frame is provided with a pair of inlets lll` and I5 and` a pair of'outlets., [Grand lll. Aprimary or main lintel portion 2| is connected at one end `by an inlet pipe 3U withthe frame inlet .I5 and is-connected at' its opposite endl by a 4pipe 3i with the frame outlet. t6; The main portionof the frame is provided with an inlet tube` 3.2I that4 at one.` end connectsto the inlet. IIII and that at the other end branchesintolpipes 331 and 34lthat extend down- As shown in Figure 3, the inlet portions i4 and I5 may have a common connection 2-'i and the outlet portions i6 and l1 may have a similar Y- shaped common outlet connection 24. This connection, of course, provides a common source and/or a common outlet, but insures a parallel or separate ow of cooling water through the main frame and lintel portions `of the device. Where a common inlet, such as 2li, is applied to the inlets ld and l5, I preferably also provide a valve 25, see Figure 5, in the inlet pipe l in order to obtain a suitable proportioning of fluid flow through the various cooling parts involved.

In the embodiment of my invention shown in Figure 1, I have provided asirnplied arrangement; in which the auxiliary lintel portion shown in my copending application Serial No. 343,406 has been eliminated. I have obtained somewhat comparable results by providing the main lintel portion 2l with a separate circulatory system' through which cooling water may Ilow in a parallel path with respect to the flow through the main frame portions oi the device.

In the embodiment of my invention shown in Figure 6, I have provided a construction suitable.

of the inlets ld and l5 or suitable suction mayv be applied to the outlets Iii and Il'.`

In the embodiment of Figure 6, the inlet flowis downwardly through the inlet kpipe 32a to the leg pipes 33 and 34, the same as in the abovedescribed embodiment of Figure l. In like manner, flow is from the inlet I4 to the inlet pipe 30a connected to one end of the lintel 2| and outwardly through the outlet pipe 3la. The outlet Sla is positioned in substantial alignment with, slightly below, and in a spaced relationship with the outlet I6. Dirty or sedimentary water from the lintel 2| is forced upwardly through pipe or jet Sla by the flow of incoming water throughy the pipe 39a and is additionally carried upwardly and outwardly through the frame outlet I6 by a substantially encircling or surrounding flow of water from the frame to and through the outlet I3. sedimentary and corrosive deposits are positively carried outwardly through the outlet i6 without falling backwardlyinto the frame of the device, and particularly, without falling backwardly into the leg portions thereof.

It will be apparent that in the embodiments ofV my invention shown in Figures l and 3, separate and independent streams of water may be employed between lintel and main body portions kof the device. It is also apparent that the stream of water supplied to each portion may thus have the exact desired temperature for best prohibiting corrosion and sedimentation while at the same time obtaining a more eiicient and uniform cooling action of va particular portion of the furnace construction. However, if desired, the pipes may be connected externally in series or'in parallel, so as to have the same or a parallel flow sequence. pend on local conditions such'V as the size of the The preferable arrangement will de.

furnace and frame and the available water supply as well as the characteristics of the particular supply. If economy in use of water is not necessary, the use of fresh water having a suitable temperature or coldness in both passages is preferable, and valves may be employed to regulate the quantity in each passage in such a manner as to get the most economical results in the furnace as a whole. It is known that cooling should be just sucient vto prevent excessive deterioration of the furnace lining and that excessive cooling lowers the furnace efficiency by lowering the temperature unduly. It is also apparent that various portions of the door frame and the furnace construction are subjected to different temffpferatures, and thus, should have different cooling temperatures than other portions thereof. It is believed that the present invention meets the problems thus presented and constitutes a substantial improvement in the art in question.

I also contemplate using a common inlet and separate outlets for regulating the flow through the two circulatory systems; that is, one outlet may be provided with suction pressure or with a higher suction pressure than the other.

l In accordance with the present invention, I am thus able to provide an independent flow of water through a lintel 2l which is ordinarily subjected to the highest temperature, of a slightly warmer temperature than the ilow through other portions of the device, while at the same time limiting and carrying off sedimentary and rust deposits.

Although for the purpose of illustration, I have shown suitable embodiments of my inveng' tion, it will be apparent to those skilled in the art that many others may be employed, including adaptations, additions, and omissions to the structures shown. It is also apparent that many suitable arrangements of the present invention may be obtained without departing from the scope thereof as indicated by the appended claims.

. I claim:

l. In a hollow water-cooled furnace door frame and skewback channel cooler, a body portion forming a top of the frame, legs forming sides of the frame, a substantially horizontal offset separated from the main body of the frame by a wall and vadapted to project into the furnace chamber beneath a skewback channel and forming a nose portion, and connections for causing a parallel low ,of water through said nose and body porlions.

2. In a hollow water-cooled furnace door frame and skewback channel cooler, a body portion forming a top of the frame, legs forming sides of the frame, a hollow substantially horizontal offset separated from the main body of the frame by a wall and adapted to project into the furnace chamber beneath a skewback channel and forming a nose portion, connections for causing a flow of water through said nose portion, and separate connections for causing a ow of water through the main body and leg portions of the frame.

3. A cooler as defined in claim 2 wherein means is provided for proportioning the flow of water through at least one of said portions relatively to the other of said portions.

4. A cooler as defined in claim 2 wherein the frame is provided with an inlet and outlet and wherein inlet connections to said nose and body portions of' the cooler are connected to the same inlet in such a manner as to provide a segregated and independent now of cooling water aaien 3 through said nose and body portions of said cooler.

5. A cooler as dened in claim 2 wherein an outlet connection for said nose portion is posi'- tioned substantially in alignment with an outlet portion of the main frame and wherein an outlet flow from the main frame substantially surrounds an outlet iiow from said nose portion.

6. In a hollow water-cooled furnace door frame and skewback; channel cooler, a body portion forming the top of the frame, legs forming sides of the frame, a substantially horizontal offset separated from the main body of the frame by a. wall and adapted to project into the furnace chamber beneath a skewback channel and forming a nose portion, connections for providing an independent flow of cooling water through said nose and main body portions of the cooler, and valvular means for proportioning the ow of cooling Water through one of said portions with re= 10 spect to the other of said portions.

EDWARD J. MCDONNELL 

